vtr20 - viewlight usa
TRANSCRIPT
VTR20
VTR10
1. Speedy astigmatism tests2. Measures myopia, presbyopia, heterophoria3. Sphere power control adjustment4. Convergence system mechanism5. Wide range of auxiliary lens combinations6. Accurate readings on binocular visual balance7. Precision measurement of spherical power
VTR-10 manual phoropter measures and determines the patients spectacle lens prescription during all eye examinations.
1. Speedy astigmatism tests2. Measures myopia, presbyopia, heterophoria3. Sphere power control adjustment4. Rotary prism and visual acuity balance5. Wide range of auxiliary lens combinations6. Accurate readings on binocular visual balance7. Precision measurement of spherical power8. High quality plated-film used in all optic lenses9. Precise refining cylinder axis and power
Viewlight’s VTR-20 features a unique design of butterfly-shape appearance and provides highly accurate readings over a wide rangemeasurements.
Viewlight’s manual phoroptors VTR-10 and VTR-20 are designed for subjective refractions determination and optically measures and aligns abnormal binocular vision such as muscle balance of the eyes, binocular balance and stereo acuity.
FEATURES
1. Tilt Clamp Knob
2. Rotation Adjustment Knob
3. Reading Rod Holder
4. Mounting Bracket
5. Leveling Knob
6. P. D. Knob
7. Spirit Level
8. P. D. Scale
9. Auxiliary Lens Scale
10. Veregence Level
11. Auxiliary Lens Knob
12. Forehead Rest Knob
13. Sphere Power Scale 14. Corneal Aligning Device
15. Rotaty Prism Unit
16. Cylinder Axis Indicator
17. Cylinder Power Knob
18. Cylinder Axis Knob
OverviewProduct
17
1816
15
13
14
12
11
7
10 9
6
43
8
5
21
Specifications
SPHERE POWERS RANGE +16.75D to - 19(.25D Steps)
CYLINDER POWERS RANGE 0 to -6.00D with minimum reading 0.25D or 0.12
CROSS CYLINDER ±0.25D, standard (±0.37D, ±0.50D)
ASTIGMATIC AXIS SCALE 0 to 1800 in 50steps
CROSS CYLINDER ±0.25D, reversal type (synchronized with astigmatic axis) ±0.50D optional
ROTARY PRISM 0 to 204 D in 14 D step
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Measurements
SPHERE POWERS RANGE +16.75D to - 19(.25D Steps)
CYLINDER POWERS RANGE 360 degrees (5 degrees)
CROSS CYLINDER ±0.25D, standard (±0.37D, ±0.50D)
ROTATING PRISM 20 prisms each (1 prism scale graduation), Paired - 40 prisms in any base direction
PD ADJUSTMENT 48-75mm (1mm Increments)
VERTEX DISTANCE 13.75mm
SCREEN 3.97 Inch TFT-LCD 800 x 480
AUX DIALS 10 lenses and 2 open apertures
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Measurements
VTR20
VTR10